What is ethnopsychiatry?

The term ‘ethnopsychiatry’ coined by the Haitian psychiatrist Louis Mars in 1946 to refer to the local presentation of psychiatric illness, was popularized in the 1950s by Georges Devereux in his psychoanalytical study of the Mohave.

Ethnopsychiatry is the systematic study of the psychiatric theories and practices of a primitive tribe. Its primary focus is, thus the exploration of culture that pertains to mental derangements, as locally understood.

Devereux suggested dividing unconscious into the id (the part that was always instinctual and unconscious) and the “ethnic unconscious” (repressed material that was once conscious).
What is ethnopsychiatry?